Here we explain the whole penis SHOWERS VS. GROWERS phenomenon:
SHOWERS: a penis that is disproportionally big when flaccid relative to the final erect length.
GROWERS: a penis that is disproportionally small when flaccid relative to the final erect length.
Showers have caused young men a little angst over the years. One problem is they do not understand that most penis are close to the same length when erect. Thus, when they see a man (who happens to be a shower) with a bigger flaccid penis than them, they falsely assume his penis is much bigger than theirs when erect. In fact the range of penis size is small enough that that is unlikely. It is more likely they are a grower and will have a greater increase in length from flaccid to erect than the other man.
You should not judge a book by its cover.
Penile Length in the Flaccid and Erect States: Guidelines for Penile Augmentation. The Journal of Urology. Volume 156, Issue 3 , Pages 995-997, September 1996
We provide guidelines of penile length and circumference to assist in counseling patients considering penile augmentation.
MATERIALS AND METHODS
We prospectively measured flaccid and erect penile dimensions in 80 physically normal men before and after pharmacological erection.
Mean flaccid length was 8.8 cm., stretched length 12.4 cm. and erect length 12.9 cm. Neither patient age nor size of the flaccid penis accurately predicted erectile length. Stretched length most closely correlated with erect length.
Only men with a flaccid length of less than 4 cm., or a stretched or erect length of less than 7.5 cm. should be considered candidates for penile lengthening.